Integrated Guidance And Control For Homing Missiles

Very small miss distance is a major requirement for missile weapons. A key tech-nology that has the potential to help achieve this ability is the integrated design of themissile guidance and control systems which can fully exploit synergism between thesetwo subsystems and thereby improve the total system performance. The current disser-tation is focus on the modeling, control design and simulation of the integrated guidanceand control for some homing missile during the diving phase. The main results consistsof the following five parts:First of all, the modeling problem of the integrated guidance and control systemis considered. Based the three-channel independent design idea and by using the lon-gitudinal and lateral accelerations to be the intermediaries between the guidance systemand the control system, the integrated guidance and control model for three-channel in-dependent design is established, where the coupling items are treated as the uncertaintieswith unknown bounds. Based on this model, the integrated guidance and control modelwith terminal angular constraints for three-channel independent design is established bytransforming the constraints on the terminal attitude angles in to the constraints on theterminal line-of-sight angles. Further, the integrated guidance and control model for fullstates coupling design is established from the point of view of nonlinear systems, whichis a veritable integrated model of the guidance and control systems.Then, the three-channel independent design problem of the integrated guidance andcontrol is considered, which is formulated as the control design problems of three timevarying subsystems. That is, the output regulation problems of the integrated guidanceand control subsystems for the roll, pitch and yaw channels. The main obstacle lies inthe fact that these subsystems are all time varying systems with nonlinear parametric un-matched uncertainties. An adaptive dynamic surface control approach is proposed forthe integrated guidance and control design. Furthermore, the modified version of thisintegrated guidance and control algorithm is also given, where the perturbations of theaerodynamic parameters are explicitly considered. The 6-DOF nonlinear numerical sim-ulation results show the effect of the proposed integrated guidance and control algorithms.In addition, The simulation results of the integrated guidance and control logic compared to the traditional guidance and control logic are given, which indicate the advantages ofthe integrated design strategy.Sequentially, the proposed adaptive dynamic surface control approach is modifiedand applied to the three channels independent design of the integrated guidance and con-trol with terminal angular constraints, which is also summarized as the output regulationproblems of three time varying subsystems with nonlinear parametric unmatched uncer-tainties. However, it is noted that here the pitch and yaw subsystems contain two outputs.According to the special structure of these two subsystems, a novel dynamic surface isconstructed by adopting the sliding mode control idea for the purpose of regulating thetwo outputs simultaneously, as a result, the integrated guidance and control design withterminal angular constraints is accomplished. The 6-DOF nonlinear numerical simulationresults show the effect of the proposed integrated guidance and control algorithm.Finally, the full states coupling design problem of the integrated guidance and con-trol is considered, which can be regarded as a partial states regulation problem of a nonau-tonomous nonlinear systems which satisfies the so-called block strict feedback form. Theobstacle also lies in the facts that there exist uncertainties in the control coefficient matri-ces besides the nonlinear parametric unmatched uncertainties in the system. An adaptiveblock dynamic surface control algorithm is proposed for such a partial states regulationproblem, thereupon, the full states coupling design of the integrated guidance and con-trol is accomplished. The 6-DOF nonlinear numerical simulation results show the effectof the proposed integrated guidance and control algorithm. Additionally, the simulationresults of the full states coupling design of the integrated guidance and control comparedto the three-channel independent design of the integrated guidance and control are given,which indicate the advantages of the coupling design strategy.